Gate Way To CGL Mains : Biology Quiz

1. When chlorophyll is burnt which element is obtained ?
(A) Ca
(B) Na
(C) Mg
(D) Mn

2. Iron deficiency results in—
(A) Leaf tip necrosis
(B) Small leaves disease
(C) Decreased protein synthesis
(D) Intervenal chlorosis appearing first in young leaves

3. A phytohormone is—
(A) Naturally produced
(B) Synthetic substance
(C) Both (A) and (B)
(D) None of these

4. During the seismonastic movement in Mimosa pudica turgor changes occur in—
(A) Leaflets
(B) Stipules
(C) Pulvinus leaf base
(D) Petiole and stem

5. Evergeen trees remain green through the year on account of—
(A) Cold climate
(B) Absence of leaf fall
(C) Leaves falling in small number interval
(D) Supply of moisture throughout year

6. Phenotypic ratio of dihybrid test cross is—
(A) 15 : 1
(B) 3 : 1
(C) 9 : 3 : 3 : 1
(D) 1 : 1 : 1 : 1

7. The damaged ozone layer is situated in—
(A) Ionosphere
(B) Mesosphere
(C) Stratosphere
(D) Troposphere

8. Which one of the following is ordinarily not an air pollutant ?
(A)  CO₂

(B) CO
(C) SO₂
(D) Hydrocarbon

9. Genes are made by—
(A) Histones
(B) Lipoproteins
(C) Hydrocarbons
(D) Polynucleotides

10. The term ‘ecosystem’ was proposed by—
(A) Odum
(B) Tansley
(C) Whitker
(D) Goli

ANSWERS KEY:
1- (C)
2- (D)
3- (A)
4- (C)
5- (C)
6- (C)
7- (C)
8- (A) 
9- (D)
10- (B)